the black-necked crane, one of the rarest species in the world.

黑颈鹤，世界上最珍稀的物种之一。

She collects rare plants.

她搜集稀有植物。

Do you want to know about a particular rare stamp or rare stamps in general?

你是想了解某一种稀有邮票还是稀有邮票的大体情况？

on those rare occasions when he did eat alone.

在那些鲜有的他独自吃饭的时候。

Heart attacks were extremely rare in babies, he said.

婴儿患心脏病是极其罕见的，他说。

I think it's very rare to have big families nowadays.

我认为现如今拥有一个大家庭是极为罕见的。

Ferris has a rare ability to record her observations on paper.

费里斯具备将自己的观察结果记录下来的超强能力。

Thick tuna steaks are eaten rare, like beef.

厚厚的金枪鱼片做到半熟即可食用，就像牛肉一样。